Which of the following is found in viruses and NOT in cells?
a
ribosomes
b
nucleolus
c
protein capsid
d
cytosol
c
protein capsid
The correct answer is c) protein capsid.
Viruses are infectious agents that contain genetic material, such as DNA or RNA, enclosed in a protein coat called a capsid. This protein capsid is unique to viruses and is not found in cells. It serves to protect the genetic material and facilitate the virus's attachment to and entry into host cells.
The correct answer is c) protein capsid.
To determine the correct answer, we need to understand the characteristics of viruses and cells.
Viruses are small infectious agents that replicate only inside the living cells of organisms. They are composed of genetic material (either DNA or RNA) surrounded by a protein coat called a capsid. The capsid serves as the protective layer of the virus and plays a crucial role in facilitating viral entry into host cells.
On the other hand, cells are the basic structural and functional units of living organisms. They contain various organelles, such as ribosomes, nucleolus, and cytosol, which are responsible for different cellular functions.
Ribosomes are present in both viruses and cells. They are responsible for protein synthesis in both cases. Nucleolus, an organelle found inside the nucleus of cells, is involved in the production of ribosomes. Therefore, it is also found in cells but not in viruses.
Cytosol, the intracellular fluid found within cells, is also present in both viruses and cells. It is the liquid component of the cytoplasm and contains various dissolved molecules, ions, and organelles.
In conclusion, the component found in viruses and NOT in cells is the protein capsid, which is a characteristic feature of viruses and is responsible for their structure and protection.